ruby review

reviewbasic-fis002-alex-au

# Testing / Assertion
# Define a method that takes two values and compares them, printing pass or fail
 

def assert_equal(actual, expected)
  if actual == expected
    return true
  else
    return false
  end
end

puts assert_equal(1,1) #=> pass
puts assert_equal(2,1) #=> fail
 
# Use assert to test the following:
 
# define a method that creates an Array of Greetings for every person's name
# greetings(["Bob", "Tim", "Jake"]) #=> ["Hello Bob!", "Hello Tim!", "Hello Jake!"]
 
def greetings(names)
  names.each_with_index do |name, index|
    names[index] = "Hello #{name}!"
  end
end
 
names = ["Brad", "Tim", "Jake"]

puts assert_equal(
  greetings(names),
  ["Hello Brad!", "Hello Tim!", "Hello Jake!"]
)
 
# define a method to sum the values of an array. Make this method defend against nils and
# other errors
 
def sum(numbers)
  sum = 0
  numbers.each do |number|
    sum += number.to_i
  end
  sum
end
 
puts assert_equal sum([]), 0
puts assert_equal sum([1,2]), 3
puts assert_equal sum([1,nil,2]), 3
puts assert_equal sum([1, "2", 2]), 3
 
# define a method that returns comfortable for temps between 60-80, cold for below and hot
# for above.
 
def temperature_bot(temp)
  if temp.between?(60, 80)
    return "comfortable"
  elsif temp > 80
    return "hot"
  elsif temp < 60
    return "cold"
  end
end
 
puts assert_equal temperature_bot(65), "comfortable"
puts assert_equal temperature_bot(70), "comfortable"
puts assert_equal temperature_bot(85), "hot"
puts assert_equal temperature_bot(30), "cold"
 
# # define an object, Person, that has a birthdate and a name. Define a method for a person
# # that returns their age.

class Person
  YEAR = Time.now.year

  attr_accessor :name, :birthday

  def age
    YEAR - @birthday[-4..-1].to_i
  end
end

begin
  person = Person.new
  person.name = "Tim Berners-Lee"
  person.birthday = "06/08/1955"
 
  puts assert_equal person.name, "Tim Berners-Lee"
  puts assert_equal person.birthday, "06/08/1955"
  puts assert_equal person.age, 58
 
rescue => e
  puts "Fail: #{e}"
end